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ESE 2022 ME - Technical Quiz 22

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Question 1

If the equivalent load in case of radial ball bearing is 500 N and the basic dynamic load rating is 62500 N, then life of this bearing is

Question 2

The figure below shows a steel rod of 25 mm2 cross sectional area. It is loaded at four points, K, L, M and N. Assume Esteel =200GPa.The total change in length of the rod due to loading is

Question 3

The shell of a boiler is 2 m in diameter and the plates are 2 cm thick. By how much % the working pressure will be reduced if the efficiency of the joint is 80% as compared to 100% efficiency
[Assume safe working stress for the shell plates as 70 MPa]

Question 4

GO and NO-GO plug gauges are to be designed for a hole mm. Gauge tolerances can be taken as 10% of the hole tolerance. The sizes of GO and NO-GO gauge will be respectively(On the basis of workshop gauge)______.

Question 5

Under logarithmic decrement, the amplitude of successive vibrations are

Question 6

The project activities, precedence relationships and durations are described in the table. The critical path of the project is

Question 7

Match List-I (type of gear failure) with List-II (Reasons) select the correct answer using the code given below the lists:
List-I
A). Scoring
B). Pitting
C). Scuffing
D). Plastic flow
List-II
1). Oil film breakage
2). Yielding of surface under heavy loads
3). Cyclic loads causing high surfaces stress
4). Insufficient lubrication

Question 8

A simple spring-mass vibrating system has a natural frequency of N. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become

Question 9

If young’s modulus of elasticity of a material is 140 GPa and Bulk modulus is 70 GPa, what will be the Poisson’s ratio (μ)?

Question 10

Which of the statements given below is/are correct ?
(1) Pressure angle is defined as the angle between the direction of follower movement & the normal to the base curve at any point.
(2) In case of radial translating roller follower, parabolic motion of the follower is very appropriate for high speed cams.
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